As the titles suggests - and I'm not referring to how a Lizardfolk might think of "flavour" - what unespected twists on classes and abilities have you seen people use for their characters?

This comes as I ponder making a bard character who is a dwarf who keeps a list of everything he has a grudge against in a small book (and I do mean everything) and whose vicious mockery is simply a string of barely intelligable insults imbued with the force of his grudges. I have also considered making an upper-class bard whose vicious mockery is their complete and utter dismissiveness of the target (Think Winston Churchhills devastating retorts to people).

So, what unusual ways have you seen people use the mechanics reflavoured to make their characters stand out from the "norm"?

I've played a shaman using the bard class once - all magic, all abilities were attributed to ancestral spirits from the tribe intervening on the shaman's behalf. If I'd do something similar now I might go with a Battlesmith Artificer, I think; Artificers are a twist on wizardly flavour to begin with, would be fun to twist it further towards divine magic, with a witchy bent. Shambles, homunculi, witches' brews, talismans, the works: lots of crafting small (and not so small) items in hedge magic. 

I had a Tempest Cleric cast all his spells via haiku (they were of varying quality).